Chemistry Project

  • 400 BCE


    First to theorize that atoms were specific to material. Atoms were different in shape and size. Constant motion, and stuck to each other. Divided a seashell to theorize how small matter could be.
  • Antoine Lavoisier

    Antoine Lavoisier
    Pioneer of stoichiometry. He showed that matter could change state in a chemical reaction. The total mass remains the same. “Nothing is lost, Nothing is created, everything is transformed.”
  • John Dalton

    John Dalton
    Theorized Atoms were indivisible and indestructible with distinct masses and properties.
    Oxygen combined with one or to volumes of nitric oxide in closed vessels over water.
  • J.J. Thomson

    J.J. Thomson
    Discovered electrons and made plum pudding model.
    Used Cathode ray tubes to show all atoms contain electrons.
  • Marie Curie

    Marie Curie
    Discovered radium and podium. Radioactivity originates with the atoms themselves.
    Investigated pitchblade to find elements.
  • Ernest Rutherford

    Ernest Rutherford
    Discovered that atoms contain a nucleus much smaller than the atom.
    Gold foil experiment particles shot at gold foil show most passed through some didn’t.
  • Max Planck

    Max Planck
    Introduced the quantum theory explains the behavior of matter and energy.
  • Albert Einstein

    Albert Einstein
    Used equations and math to prove the atoms' existence.
    Used mostly math to experiment with atoms equations and theories to prove things happen without experimenting directly.
  • Robert Millikan

    Robert Millikan
    Discovered the accurate charge of an electron.
    Used falling drop method: Small electrically charged drops of oil were suspended between two metal plates where they were subjected to the downward force of gravity and the upward attraction of an electrical field.
  • Niels Bohr

    Niels Bohr
    Bohr model, and discovered some physicals values only take discrete values.
    Nuclear fission splitting nucleus of atom to experiment.
  • Louis De Broglie

    Louis De Broglie
    Waves can be used the same way as particles.
    Streams of electrons reflected against crystals and spread through metal foils.
  • Werner Heisenberg

    Werner Heisenberg
    Made a type of quantum mechanics based on matrices. Set limits for particles.
    Gamma ray microscope illumination would cause the electron to move.
  • Erwin Schrodinger

    Erwin Schrodinger
    Wave equation calculates the energy of electrons.
    Schrodingers cat experiment hypothesized that atoms are in decay and non decay until it is observed.
  • James Chadwick

    James Chadwick
    Discovered Neutron.
    Shot alpha particles at beryllium producing what he called neutrons.